ghsa-5v2h-r2cx-5xgj
Vulnerability from github
Published
2022-01-14 21:04
Modified
2022-01-14 19:57
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Inefficient Regular Expression Complexity in marked
Details

Impact

What kind of vulnerability is it?

Denial of service.

The regular expression inline.reflinkSearch may cause catastrophic backtracking against some strings. PoC is the following.

```javascript import * as marked from 'marked';

console.log(marked.parse(`[x]: x

\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\[\](\\; ```

Who is impacted?

Anyone who runs untrusted markdown through marked and does not use a worker with a time limit.

Patches

Has the problem been patched?

Yes

What versions should users upgrade to?

4.0.10

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

Do not run untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.

References

Are there any links users can visit to find out more?

  • https://marked.js.org/using_advanced#workers
  • https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS

For more information

If you have any questions or comments about this advisory:

Show details on source website

To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "affected_functions": [
          "(marked).parse"
        ]
      },
      "package": {
        "ecosystem": "npm",
        "name": "marked"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-21681"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-01-14T19:57:17Z",
    "nvd_published_at": "2022-01-14T17:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\n_What kind of vulnerability is it?_\n\nDenial of service.\n\nThe regular expression `inline.reflinkSearch` may cause catastrophic backtracking against some strings.\nPoC is the following.\n\n```javascript\nimport * as marked from \u0027marked\u0027;\n\nconsole.log(marked.parse(`[x]: x\n\n\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](\\\\[\\\\](`));\n```\n\n_Who is impacted?_\n\nAnyone who runs untrusted markdown through marked and does not use a worker with a time limit.\n\n### Patches\n\n_Has the problem been patched?_\n\nYes\n\n_What versions should users upgrade to?_\n\n4.0.10\n\n### Workarounds\n\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nDo not run untrusted markdown through marked or run marked on a [worker](https://marked.js.org/using_advanced#workers) thread and set a reasonable time limit to prevent draining resources.\n\n### References\n\n_Are there any links users can visit to find out more?_\n\n- https://marked.js.org/using_advanced#workers\n- https://owasp.org/www-community/attacks/Regular_expression_Denial_of_Service_-_ReDoS\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue in [marked](https://github.com/markedjs/marked)\n",
  "id": "GHSA-5v2h-r2cx-5xgj",
  "modified": "2022-01-14T19:57:17Z",
  "published": "2022-01-14T21:04:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/markedjs/marked/security/advisories/GHSA-5v2h-r2cx-5xgj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-21681"
    },
    {
      "type": "WEB",
      "url": "https://github.com/markedjs/marked/commit/8f806573a3f6c6b7a39b8cdb66ab5ebb8d55a5f5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/markedjs/marked/commit/c4a3ccd344b6929afa8a1d50ac54a721e57012c0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/markedjs/marked"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AIXDMC3CSHYW3YWVSQOXAWLUYQHAO5UX"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Inefficient Regular Expression Complexity in marked"
}


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